That I understand Bill. And to get the adaptive MA is the easy part. But how do 
you get the adaptive standard deviation ? Impossible in AFL. <Periodes> in 
StDev() can not be an array ...

Regards, Ton.

  ----- Original Message ----- 
  From: wavemechanic 
  To: [email protected] 
  Sent: Friday, April 11, 2008 6:40 PM
  Subject: Re: [amibroker] Bollinger Band with variable period in AFL



  BB is just X standard deviations around a moving average.  So, I suppose one 
way to go is to use an adaptive moving average (e.g., Kaufman's) to get an 
adaptive BB.

  Bill

  ----- Original Message ----- 
  From: "amsiev" <[EMAIL PROTECTED]>
  To: <[email protected]>
  Sent: Friday, April 11, 2008 5:35 AM
  Subject: [amibroker] Bollinger Band with variable period in AFL


  > AFL has BBandTop with following syntax : 
  > BBandTop( ARRAY, periods = 15, width = 2 ) 
  > 
  > <Periods> must be numerical. As I want to get a dynamic BB I need an 
  > array in periods. Any suggestions how to get this done ?
  > 
  > Regards, Ton.
  > 
  > 
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